Commit 47ba05ac authored by Richard M. Stallman's avatar Richard M. Stallman
Browse files

entered into RCS

parent e6a9aec7
......@@ -9,7 +9,7 @@
A @dfn{buffer} is a Lisp object containing text to be edited. Buffers
are used to hold the contents of files that are being visited; there may
also be buffers which are not visiting files. While several buffers may
also be buffers that are not visiting files. While several buffers may
exist at one time, exactly one buffer is designated the @dfn{current
buffer} at any time. Most editing commands act on the contents of the
current buffer. Each buffer, including the current buffer, may or may
......@@ -37,14 +37,14 @@ not be displayed in any windows.
@ifinfo
A @dfn{buffer} is a Lisp object containing text to be edited. Buffers
are used to hold the contents of files that are being visited; there may
also be buffers which are not visiting files. While several buffers may
also be buffers that are not visiting files. While several buffers may
exist at one time, exactly one buffer is designated the @dfn{current
buffer} at any time. Most editing commands act on the contents of the
current buffer. Each buffer, including the current buffer, may or may
not be displayed in any windows.
@end ifinfo
Buffers in Emacs editing are objects which have distinct names and
Buffers in Emacs editing are objects that have distinct names and
hold text that can be edited. Buffers appear to Lisp programs as a
special data type. The contents of a buffer may be viewed as an
extendable string; insertions and deletions may occur in any part of the
......@@ -52,7 +52,7 @@ buffer. @xref{Text}.
A Lisp buffer object contains numerous pieces of information. Some of
this information is directly accessible to the programmer through
variables, while other information is only accessible through
variables, while other information is accessible only through
special-purpose functions. For example, the visited file name is
directly accessible through a variable, while the value of point is
accessible only through a primitive function.
......@@ -403,24 +403,24 @@ normally, or if the file itself has been changed for some known benign
reason.
@end defun
@defun ask-user-about-supersession-threat fn
@defun ask-user-about-supersession-threat filename
@cindex obsolete buffer
This function is used to ask a user how to proceed after an attempt to
modify an obsolete buffer. An @dfn{obsolete buffer} is an unmodified
buffer for which the associated file on disk is newer than the last
save-time of the buffer. This means some other program has probably
altered the file.
This function is called automatically by Emacs on the proper
occasions. It exists so you can customize Emacs by redefining it.
See the file @file{userlock.el} for the standard definition.
modify an obsolete buffer visiting file @var{filename}. An
@dfn{obsolete buffer} is an unmodified buffer for which the associated
file on disk is newer than the last save-time of the buffer. This means
some other program has probably altered the file.
@kindex file-supersession
Depending on the user's answer, the function may return normally, in
which case the modification of the buffer proceeds, or it may signal a
@code{file-supersession} error with data @code{(@var{fn})}, in which
@code{file-supersession} error with data @code{(@var{filename})}, in which
case the proposed buffer modification is not allowed.
This function is called automatically by Emacs on the proper
occasions. It exists so you can customize Emacs by redefining it.
See the file @file{userlock.el} for the standard definition.
See also the file locking mechanism in @ref{File Locks}.
@end defun
......@@ -460,14 +460,16 @@ The buffer is read-only if this variable is non-@code{nil}.
@defvar inhibit-read-only
If this variable is non-@code{nil}, then read-only buffers and read-only
characters may be modified. The value of @code{buffer-read-only} does
not matter when @code{inhibit-read-only} is non-@code{nil}.
If @code{inhibit-read-only} is @code{t}, all @code{read-only} text
properties have no effect (@pxref{Special Properties}). If
@code{inhibit-read-only} is a list, then @code{read-only} text
properties are ignored if they are members of the list (comparison is
done with @code{eq}).
characters may be modified. Read-only characters in a buffer are those
that have non-@code{nil} @code{read-only} properties (either text
properties or overlay properties). @xref{Special Properties}, for more
information about text properties. @xref{Overlays}, for more
information about overlays and their properties.
If @code{inhibit-read-only} is @code{t}, all @code{read-only} character
properties have no effect. If @code{inhibit-read-only} is a list, then
@code{read-only} character properties have no effect if they are members
of the list (comparison is done with @code{eq}).
@end defvar
@deffn Command toggle-read-only
......@@ -547,11 +549,11 @@ without changing the order of any of the other buffers on the list.
This buffer therefore becomes the least desirable candidate for
@code{other-buffer} to return.
If @var{buffer-or-name} is @code{nil} or omitted, this means to bury
the current buffer. In addition, this switches to some other buffer
(obtained using @code{other-buffer}) in the selected window. If the
buffer is displayed in a window other than the selected one, it remains
there.
If @var{buffer-or-name} is @code{nil} or omitted, this means to bury the
current buffer. In addition, if the buffer is displayed in the selected
window, this switches to some other buffer (obtained using
@code{other-buffer}) in the selected window. But if the buffer is
displayed in some other window, it remains displayed there.
If you wish to replace a buffer in all the windows that display it, use
@code{replace-buffer-in-windows}. @xref{Buffers and Windows}.
......@@ -563,9 +565,9 @@ If you wish to replace a buffer in all the windows that display it, use
@cindex buffers, creating
This section describes the two primitives for creating buffers.
@code{get-buffer-create} creates a buffer if it finds no existing
buffer; @code{generate-new-buffer} always creates a new buffer, and
gives it a unique name.
@code{get-buffer-create} creates a buffer if it finds no existing buffer
with the specified name; @code{generate-new-buffer} always creates a new
buffer and gives it a unique name.
Other functions you can use to create buffers include
@code{with-output-to-temp-buffer} (@pxref{Temporary Displays}) and
......@@ -595,9 +597,9 @@ The major mode for the new buffer is set according to the variable
This function returns a newly created, empty buffer, but does not make
it current. If there is no buffer named @var{name}, then that is the
name of the new buffer. If that name is in use, this function adds
suffixes of the form @samp{<@var{n}>} are added to @var{name}, where
@var{n} is an integer. It tries successive integers starting with 2
until it finds an available name.
suffixes of the form @samp{<@var{n}>} to @var{name}, where @var{n} is an
integer. It tries successive integers starting with 2 until it finds an
available name.
An error is signaled if @var{name} is not a string.
......@@ -629,9 +631,9 @@ Names}.
@cindex buffers, killing
@dfn{Killing a buffer} makes its name unknown to Emacs and makes its
space available for other use.
text space available for other use.
The buffer object for the buffer which has been killed remains in
The buffer object for the buffer that has been killed remains in
existence as long as anything refers to it, but it is specially marked
so that you cannot make it current or display it. Killed buffers retain
their identity, however; two distinct buffers, when killed, remain
......@@ -733,8 +735,8 @@ is designated.
When an editing command returns to the editor command loop, the
command loop designates the buffer displayed in the selected window as
current, to prevent confusion: the buffer that the cursor is in, when
Emacs reads a command, is the one to which the command will apply.
current, to prevent confusion: the buffer that the cursor is in when
Emacs reads a command is the buffer that the command will apply to.
(@xref{Command Loop}.) Therefore, @code{set-buffer} is not the way to
switch visibly to a different buffer so that the user can edit it. For
this, you must use the functions described in @ref{Displaying Buffers}.
......@@ -788,7 +790,7 @@ is unbound.
It is not reliable to change the current buffer back with
@code{set-buffer}, because that won't do the job if a quit happens while
the wrong buffer is current. Here is what not to do:
the wrong buffer is current. Here is what @emph{not} to do:
@example
@group
......@@ -801,8 +803,8 @@ the wrong buffer is current. Here is what not to do:
@end example
@noindent
Using @code{save-excursion}, as shown below, handles quitting, errors
and @code{throw} as well as ordinary evaluation.
Using @code{save-excursion}, as shown below, handles quitting, errors,
and @code{throw}, as well as ordinary evaluation.
@example
@group
......
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